H-Q Zhan1, P-F Li, S-Y Li, F-L Yan, J Yang, R-L Liu, H-F Zhang. 1. AIM: This study aimed to determine the effect of Lactuside B isolated from Pterocypsela alata on the expression of AQP4 and TRPM7 mRNAs after cerebral ischemic injury. MATERIALS AND METHODS: Brain ischemia injury was established by occluding the MCA (middle cerebral artery) for 2 h, followed by reperfusion in rats. The neurologic deficit scores were used to determine the success of the model. All drugs were intraperitoneally administered once a day (5 ml/kg). Eight animals from each group were investigated for the Na+ level, and the others were examined for AQP4 and TRPM7 mRNA changes. RESULTS: Compared with the model group, the neurologic deficit scores and Na+ levels decreased in the lactuside B groups (p < 0.05 vs. p < 0.01). All lactuside B groups had significantly decreased AQP4 and TRPM7 mRNA expression compared with the model group (p < 0.05 vs. < 0.01). Dose dependence was observed between low and medium doses. CONCLUSIONS: Lactuside B protected against cerebral edema and nerve cell damage caused by cerebral ischemic injury by decreasing the expression of AQP4 and TRPM7 mRNAs in the cerebral cortex of rats.
Abstract
AIM: This study aimed to determine the effect of Lactuside B isolated from Pterocypsela alata on the expression of AQP4 and TRPM7 mRNAs after cerebral ischemic injury. MATERIALS AND METHODS: Brain ischemia injury was established by occluding the MCA (middle cerebral artery) for 2 h, followed by reperfusion in rats. The neurologic deficit scores were used to determine the success of the model. All drugs were intraperitoneally administered once a day (5 ml/kg). Eight animals from each group were investigated for the Na+ level, and the others were examined for AQP4 and TRPM7 mRNA changes. RESULTS: Compared with the model group, the neurologic deficit scores and Na+ levels decreased in the lactuside B groups (p < 0.05 vs. p < 0.01). All lactuside B groups had significantly decreased AQP4 and TRPM7 mRNA expression compared with the model group (p < 0.05 vs. < 0.01). Dose dependence was observed between low and medium doses. CONCLUSIONS: Lactuside B protected against cerebral edema and nerve cell damage caused by cerebral ischemic injury by decreasing the expression of AQP4 and TRPM7 mRNAs in the cerebral cortex of rats.
AIM: This study aimed to determine the effect of Lactuside B isolated from Pterocypsela alata on the expression of AQP4 and TRPM7 mRNAs after cerebral ischemic injury. MATERIALS AND METHODS: Brain ischemia injury was established by occluding the MCA (middle cerebral artery) for 2 h, followed by reperfusion in rats. The neurologic deficit scores were used to determine the success of the model. All drugs were intraperitoneally administered once a day (5 ml/kg). Eight animals from each group were investigated for the Na+ level, and the others were examined for AQP4 and TRPM7 mRNA changes. RESULTS: Compared with the model group, the neurologic deficit scores and Na+ levels decreased in the lactuside B groups (p < 0.05 vs. p < 0.01). All lactuside B groups had significantly decreased AQP4 and TRPM7 mRNA expression compared with the model group (p < 0.05 vs. < 0.01). Dose dependence was observed between low and medium doses. CONCLUSIONS:Lactuside B protected against cerebral edema and nerve cell damage caused by cerebral ischemic injury by decreasing the expression of AQP4 and TRPM7 mRNAs in the cerebral cortex of rats.